HindlePower AT10.1 Series Operating Instructions Manual page 12

HARDWARE
3.2.2.2 RS-485 Multi-Drop
When multiple chargers are connected using RS-485, and termination resistors are required,
the termination resistors should only be installed (enabled) on the ends of the network. Move
the jumper on J22 between pins 1 and 2 to enable the terminating resistor. The devices in the
middle of the network do not require the terminating resistor. Move the jumper on J22
between pins 2 and 3 to disable the terminating resistor. Figure 6 and Figure 7 show
examples of multiple chargers on a RS-485 serial network.
Charger No. 1 Charger No. 2
5 5
8 7
RS-485 Multi-Drop
2 Chargers
POSITIVE (+)
NEGATIVE (--)
COMMON
SHIELD
Figure 6
RS-485 Multi-Drop 2 Chargers
* Typical RS-485 applications tie the shield to earth ground at only one (1) location along the
network. Consult your organization's standard network grounding practices.
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